Deprecation Notice:

This SDK is deprecated; you can continue to use it, but no new features or support requests will be accepted. An integration with the new Server SDK is recommended. Review the docs for details.

Paypal HttpClient

PaypalHttp is a generic HTTP Client.

In it's simplest form, an HttpClient exposes an #execute method which takes an HTTP request, executes it against the domain described in an Environment, and returns an HTTP response.

Environment

An Environment describes a domain that hosts a REST API, against which an HttpClient will make requests. Environment is a simple class that contains one property, base_url.

env = Environment.new('https://example.com')

Requests

HTTP requests contain all the information needed to make an HTTP request against the REST API. Specifically, one request describes a path, a verb, any path/query/form parameters, headers, attached files for upload, and body data. In Ruby, an HTTP request is simply an OpenStruct literal with path, verb, and optionally, request_body, and headers populated.

Responses

HTTP responses contain information returned by a server in response to a request as described above. They are simple objects which contain a status_code, headers, and a result, which reprepsents any data returned by the server.

req = OpenStruct.new({
  :path => 'path/to/resource',
  :verb => 'GET',
  :headers => {
    'X-Custom-Header' => 'custom_value'
  }
})

resp = client.execute(req)
status_code = resp.status_code;
headers = resp.headers;
response_data = resp.result;

Injectors

Injectors are blocks that can be used for executing arbitrary pre-flight logic, such as modifying a request or logging data. Injectors are attached to an HttpClient using the #add_injector method. They must take one argument (a request).

The HttpClient executes its injectors in a first-in, first-out order, before each request.

let client = new HttpClient(env);
client.add_injector do |request|
  puts req
end

client.add_injector do |request|
  req.headers['Request-Id'] = 'abcd'
end

...

Error Handling

HttpClient#execute may throw an IOError if something went wrong during the course of execution. If the server returned a non-200 response, this execption will be an instance of HttpError that will contain a status code and headers you can use for debugging.

begin
  resp = http_client.execute(req)
rescue => e
  if e.is_a? HttpError
    # Inspect this exception for details
    status_code = e.status_code;
  end
end

Serializer

(De)Serialization of request and response data is done by instances of Encoder. PayPalHttp currently supports json encoding out of the box.

License

PayPalHttp-Ruby is open source and available under the MIT license. See the LICENSE file for more information.

Contributing

Pull requests and issues are welcome. Please see CONTRIBUTING.md for more details.